Data management (GCARCHIV)
GCARCHIV
permits the storage of results, chroma-
tograms and raw data. These stored data can be
loaded again later and viewed or processed.
Possible usage: the integration can be optimized at a
desk without a chromatograph being connected to the
PC (reintegration). This functions as follows:
For example, several analyses are run automatically
at night. The control unit must be connected, and
the raw data transmission function switched on.
The results and raw data are stored on a diskette on
the next morning.
Load the runs from the diskette onto the desk PC.
Optimize the integration (reintegrate) without a
chromatograph being connected. Its function is
handled by the separate software package
PGCSIM
.
What data have to be managed?
A run in the chromatograph generates three types of
data:
Report (results)
This is a text file containing e.g. component names
and concentrations. This file is produced with every
run.
Chromatograms
These are compressed data of the detector signal
with all peak detection information, e.g. start of
peak, end of peak, component name. This file is
only produced if transmission of the chromatogram
to the control unit is switched on!
Raw data
This is a binary file. It contains the non-compressed
data of the detector signal up to the duration of 20
minutes. This file is only produced if transmission
of the raw data to the control unit is switched on!
You can find more details in this Manual under Re-
integration.
The storage function always handles the report and
chromatogram together. This means that the associated
chromatogram is always stored together with a report if
it is present.
Where is the archive,
and what fits into it?
Archives can be created on the hard disk of the control
unit or on diskettes. Any number of archives are per-
missible. Each archive must have a different name.
It is possible to write in succession into the same
archive, even data from different chromatographs. This
is seldom meaningful, however, because of the loss of
clarity. It is therefore better to create a separate archive
for each chromatograph.
Writing data into the archive
An archive can contain a maximum of:
500 reports
500 chromatograms
500 raw data
One analytical method
One information file.
It is better to create several small archives with a few
files than one large archive with many files.
Reading data from the archive
In order to read files stored using the operating soft-
ware, it is necessary to load them from the archive.
This can be carried out simultaneously for a maximum
of:
100 reports
100 chromatograms
100 raw data
One analytical method
A larger number would not be meaningful since selec-
tion of the file would become unclear. It is possible to
repeatedly load a number of files in succession from the
same archive or from different archives until 100 files
are reached. It is possible to delete old files before more
files are loaded from the archive, thus retaining clarity.
Analytical method
An archive can also contain an analytical method. You
must know whether you wish to use the current method
or the method in the archive.
Information file
Information on the files, the analytical method, the run
conditions etc. are stored in this text file. This helps to
subsequently retain clarity amongst the archives.
GCARCHIV: Data management
8
5GCARCH.CHP, Stand Dezember 22, 1999
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